Solar panel



FIG. 1 is a perspective view of a solar panel showing our new design.

FIG. 2 is a top plan view of a second embodiment of a solar panel showing our new design; and,

FIG. 3 is a perspective view of a third embodiment of a solar panel showing our new design.

The remaining sides and bottom of each solar panel embodiment being unornamented and forming no part of the claimed design. 

The ornamental design for a solar panel, as shown and described. 